What do you mean by Unlock? If you see the thumbnails, you can always go to the properties and open that image in folder from the location it is saved on your hard disk.
The thumbnail says "missing
file" and i cannot recover it following any of photoshops instructions.
These files might not be present in the location which they were imported from initially. In case you have changed the location of those photos after you had imported into your Photoshop Album starter edition, those cannot be found by the application and will mark them as missing files. Hence you will need to manually point them to the current location.
Tried that...cannot find them anywhere. The thumbnails have a red broken box
on them indicating missing files.